Cloud outages are becoming are more common occurance than proponents of these solutions would like to admit. Monitoring cloud based applications is a strategy which may prevent these embarrasing situations from occuring:
Amazon’s cloud went down, again, this time on Christmas Eve, for 12 hours, blacking out 7% of AWS customers. Will continued cloud outages erode confidence in the public cloud?
You can read more about the Amazon cloud outage here: How long will big-name customers like Netflix put up with Amazon cloud outages?